Powerful gusts attaining velocities of as high as 155km/h (96mph) have resulted in nearly 90,000 properties experiencing outages and led authorities to halt more than 100 aircraft departures, as reported by local media.
The gales are affecting the entire South Island and lower areas of the northern region, according to the weather forecasting body.
Officials in New Zealand have announced rare severe gust advisories - the highest alert level - in core zones encompassing Canterbury and Wellington.
People have been advised to remain inside, avoid travel, and prepare for additional electricity and network failures.
Extensive Destruction and Emergency Response
The electricity loss appears to be affecting homes mainly in the southern region, although authorities say that the electricity supply was being slowly brought back.
Regional news have indicated that in various locations structures have suffered roof damage, and power lines and trees have been toppled by the winds.
Across Wellington, a individual was lost his life after being struck by a tree branch at a popular trail walking spot on earlier this week.
Also in the capital, a female was swept into moving cars on a road by a strong gust of wind, in a incident that was filmed in a popular vehicle recording.
Aircraft services in and out of the urban area have been suspended as a result of the gusts, and some roads and libraries are also closed.
Meanwhile authorities in Canterbury have announced a state of emergency, to facilitate emergency management operations.
Strike Action During Severe Conditions
The powerful gales on this day come as many of school staff, physicians and civil servants take part in what has been called a "significant labor action", demanding improved salaries and workplace environments.
Yet the extreme weather has compelled them to change certain arrangements, with various open-air gatherings shifted to interior venues or called off.
Similar gusts are affecting the nearby nation, ushering in a period of extreme heat to the remote areas.
Officials have announced burning restrictions for apprehension regarding bushfires.
